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Remove 'else' sections of 'for' loops from app.
(and the one in checkCurrentSerialInTransaction was broken)

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2579 71dcc9de-d417-0410-9af5-da40c76e7ee4

This commit fix random issues found with functionnal tests where the client
was refuse by the storage, because the latter was not fully initialized,
but never tried to reconnect to it if no other storages were available.

The main change introoduced is the availability of 'iterateForObject'
method on ConnectionPool. It allow iterate over potential node connections
for a given object id with the ability of waiting for the node to be ready
if not. It includes the common pattern that retreive the cell list,
randomize then sort them and never returns a None value, which suppose that
the outer loop must check if at least one iteration happens, for example.

Also included:
- getPartitionTable is now private because the connection needs it
- Deletion of _getCellListFor*
- Fixed tests
- New tests for ConnectionPool.iterateForObject

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2578 71dcc9de-d417-0410-9af5-da40c76e7ee4

So that search and add in connection_dict is made in the same method.

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This fixes cases where storage tries to answer a request after executing
queued events. This cannto happen with current code, but will happen in
near future.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2574 71dcc9de-d417-0410-9af5-da40c76e7ee4

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This is not used currently, and prevents method argument extension.

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This prevents doing pop(0)/insert(0, ...) needlessly on the first item.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2570 71dcc9de-d417-0410-9af5-da40c76e7ee4

- Pop queued transaction from the beginning instead of end
- Restore test for begin with a tid
- Add test to check transactions unlocking mechanism
- Add/fix comments

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- add missing status parameter
- tabs are evil
- use sys.exit instead of raising KeyboarInterrupt (it raises SystemExit)

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The "data" parameter was meant to be used as an opaque type, but as
"forget" method needs to know its structure, stop pretending it's opaque.
This simplifies dispatch arguments a little bit.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2559 71dcc9de-d417-0410-9af5-da40c76e7ee4

Also, factorise refcount code.

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Hotshot profiling shows FIFO.head() is called very often (~300k times for
embedded test suite). This change showed a ~30% speed increase for tested
case.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2553 71dcc9de-d417-0410-9af5-da40c76e7ee4

It updates self._size, so we must read it from there each time.
This also uses the history queue, which was ignored by this code, hence
this should make better use of MQ algorithm.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2552 71dcc9de-d417-0410-9af5-da40c76e7ee4

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undoLog doesn't work when first is non-zero, this breaks iterator and
cannot be fixed for undoLog at the moment.

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